using System;
using System.Collections.Generic;

public class TokenResponse
{
    public string ErrorTrace { get; set; }
    public int? ErrorCode { get; set; }
    public string Prompt { get; set; }
    public bool Success { get; set; }
    public TokenData Data { get; set; }
}

public class TokenData
{
    public string AccessToken { get; set; }
    public int ExpiresIn { get; set; }
}

public class TokenService
{
    // 模拟的appkey和appsecret，实际使用时应从配置文件或安全存储中获取
    private static readonly string ValidAppKey = "IN2GvivxLR4nel";
    private static readonly string ValidAppSecret = "ktFBu91tCtrVf3ocmbEZbfKG4";

    public TokenResponse CreateToken(string appkey, string appsecret)
    {
        // 验证appkey和appsecret
        if (appkey != ValidAppKey || appsecret != ValidAppSecret)
        {
            return new TokenResponse
            {
                ErrorTrace = "Invalid appkey or appsecret",
                ErrorCode = 401,
                Prompt = "Invalid parameters",
                Success = false
            };
        }

        // 生成token
        string accessToken = GenerateAccessToken();
        int expiresIn = 86733; // 示例值，实际有效期可能略有不同

        return new TokenResponse
        {
            ErrorTrace = null,
            ErrorCode = null,
            Prompt = null,
            Success = true,
            Data = new TokenData
            {
                AccessToken = accessToken,
                ExpiresIn = expiresIn
            }
        };
    }

    private string GenerateAccessToken()
    {
        // 这里可以使用更复杂的逻辑来生成token，例如使用JWT
        return Guid.NewGuid().ToString("N"); // 示例：使用GUID生成token
    }
}